<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */


/**
 * Smarty truncate modifier plugin
 *
 * Type:	 modifier<br>
 * Name:	 truncate<br>
 * Purpose:  Truncate a string to a certain length if necessary,
 *		   optionally splitting in the middle of a word, and
 *		   appending the $etc string or inserting $etc into the middle.
 * @link http://smarty.php.net/manual/en/language.modifier.truncate.php
 *		  truncate (Smarty online manual)
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @param string
 * @param integer
 * @param string
 * @param boolean
 * @param boolean
 * @return string
 */
function smarty_modifier_truncate($string, $length = 80, $etc = '...', $break_words = false, $middle = false) {
	if ($length == 0) {
		return '';
	}
	
	if (function_exists('mb_strlen')) {
		$strlen_func = 'mb_strlen';
		$substr_func = 'mb_substr';
	} elseif (function_exists('iconv_strlen')) {
		$strlen_func = 'iconv_strlen';
		$substr_func = 'iconv_substr';
	} else {
		$strlen_func = 'strlen';
		$substr_func = 'substr';
	}
	
	if ($strlen_func($string) > $length) {
		$length -= min($length, $strlen_func($etc));
		if (!$break_words && !$middle) {
			$string = preg_replace('/\s+?(\S+)?$/', '', $substr_func($string, 0, $length+1));
		}
		if(!$middle) {
			return $substr_func($string, 0, $length) . $etc;
		} else {
			return $substr_func($string, 0, $length/2) . $etc . $substr_func($string, -$length/2);
		}
	} else {
		return $string;
	}
}

?>
